2023

  1. ICD-10-CM Codes
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  2. A00-B99
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  3. A30-A49
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  5. 2023 ICD-10-CM Diagnosis Code A39.81

2023 ICD-10-CM Diagnosis Code A39.81

Meningococcal encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • A39.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM A39.81 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of A39.81 - other international versions of ICD-10 A39.81 may differ.
The following code(s) above A39.81 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A39.81:
  • A00-B99
    2023 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
ICD-10-CM A39.81 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 023 Craniotomy with major device implant or acute complex cns principal diagnosis with mcc or chemotherapy implant or epilepsy with neurostimulator
  • 024 Craniotomy with major device implant or acute complex cns principal diagnosis without mcc
  • 094 Bacterial and tuberculous infections of nervous system with mcc
  • 095 Bacterial and tuberculous infections of nervous system with cc
  • 096 Bacterial and tuberculous infections of nervous system without cc/mcc

Convert A39.81 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
Code annotations containing back-references to A39.81:
  • Type 1 Excludes: G05
    ICD-10-CM Diagnosis Code G05

    Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Code First
    • underlying disease, such as:
    • congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1)
    • cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8)
    • encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19)
    • eosinophilic meningoencephalitis (B83.2)
    • human immunodeficiency virus [HIV] disease (B20)
    • poliovirus (A80.-)
    • suppurative otitis media (H66.01-H66.4)
    • trichinellosis (B75)
    Type 1 Excludes
    • adenoviral encephalitis, myelitis and encephalomyelitis (A85.1)
    • encephalitis, myelitis and encephalomyelitis (in) measles (B05.0)
    • enteroviral encephalitis, myelitis and encephalomyelitis (A85.0)
    • herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4)
    • listerial encephalitis, myelitis and encephalomyelitis (A32.12)
    • meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)
    • mumps encephalitis, myelitis and encephalomyelitis (B26.2)
    • postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-)
    • rubella encephalitis, myelitis and encephalomyelitis (B06.01)
    • toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2)
    • zoster encephalitis, myelitis and encephalomyelitis (B02.0)

Diagnosis Index entries containing back-references to A39.81:
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
    ICD-10-CM Diagnosis Code G04.90

    Encephalitis and encephalomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Ventriculitis (cerebral) NOS
    • meningococcal A39.81
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • meningococcal A39.9
      - see also condition
      ICD-10-CM Diagnosis Code A39.9

      Meningococcal infection, unspecified

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      Applicable To
      • Meningococcal disease NOS
      • brain A39.81
  • Meningoencephalitis G04.90
    - see also Encephalitis
    ICD-10-CM Diagnosis Code G04.90

    Encephalitis and encephalomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Ventriculitis (cerebral) NOS
    • epidemic A39.81
  • Meningomyelitis - see also Meningoencephalitis
    • meningococcal A39.81

ICD-10-CM Codes Adjacent To A39.81
A39.1 Waterhouse-Friderichsen syndrome
A39.2 Acute meningococcemia
A39.3 Chronic meningococcemia
A39.4 Meningococcemia, unspecified
A39.5 Meningococcal heart disease
A39.50 Meningococcal carditis, unspecified
A39.51 Meningococcal endocarditis
A39.52 Meningococcal myocarditis
A39.53 Meningococcal pericarditis
A39.8 Other meningococcal infections
A39.81 Meningococcal encephalitis
A39.82 Meningococcal retrobulbar neuritis
A39.83 Meningococcal arthritis
A39.84 Postmeningococcal arthritis
A39.89 Other meningococcal infections
A39.9 Meningococcal infection, unspecified
A40 Streptococcal sepsis
A40.0 Sepsis due to streptococcus, group A
A40.1 Sepsis due to streptococcus, group B
A40.3 Sepsis due to Streptococcus pneumoniae
A40.8 Other streptococcal sepsis

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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